SQL union, merge, subquery 명령어 요약

-- 고객을 관리하는 직원 목록 출력 select sawon_no, sawon_name from sawon where sawon_no in(select sawon_no from sawon); select sawon_no, sawon_name from sawon where sawon_no in(select sawon_no from sawon intersect select gogek_damsano from gogek); -- 고객을 관리하지 않는 직원 목록 출력 select sawon_no, sawon_name from sawon where sawon_no in(select sawon_no from sawon minus select g..